More crude is leaking at an oilfield in the Bohai Sea…where a major spill occurred last year. In the latest incident, ConocoPhillips China said 0.6 tons of crude oil were spilled…ConocoPhillips China and China National Offshore Oil Corp. (CNOOC) own the oilfield. The latest spill occurred at a different platform than the two that leaked last year. CNOOC released a statement…that…rig operator ConocoPhillips…said that a safety device on a valve on the main pipe failed. ConocoPhillips also told CNOOC that it cleaned up the oil slick immediately after it was discovered. An inspection by CNOOC showed that…on June 4, no oil was seen on the water…